Extraordinary design and engineering! The first thing I noticed was the excellent level design. The way dungeons, level-ups, keys, and power-ups are naturally connected makes the progression feel organic rather than linear. It flows very well and feels very thoughtfully constructed.
The graphics are beautiful, and the character movement feels pixel-perfect, which I really appreciate. The controls and physics are smooth and clean. The boss fight was a bit challenging with the WASD controls combined with the space key, but that is understandable. I could easily see this becoming a strong title on consoles.
One thing I noticed is that same-room enemies respawn immediately after Rest. I am not sure whether this is intentional, but it creates a small loophole where players can repeatedly rest, defeat enemies, and level up more easily than expected. The respawn on room transition, on the other hand, feels like standard dungeon design and works very well.